Mixed convection heat transfer and entropy generation of MHD hybrid nanofluid in a cubic porous cavity with wavy wall and rotating cylinders

Jiang, Xiaobin; Hatami, M.; Abderrahmane, Aissa; Younis, Obai; Makhdoum, Basim M.

doi:10.1016/j.applthermaleng.2023.120302

Cited by 52 publications

(9 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They observed that the permeability zones closer to the hot cylinder decreased in the best configuration. Jiang et al (2023) used two RCs in a 3D enclosure with a corrugated upper wall. The porosity of the medium was considered, and the finite element method (FEM) solver was used.…”

Section: Introductionmentioning

confidence: 99%

Conductive panel cooling by using coupled effects of nano-jet impingement, double rotating cylinders and magnetic field under cross-flow

Selimefendigil,

Oztop

2024

HFF

View full text Add to dashboard Cite

Purpose This study aims to examine the effects of cross-flow and multiple jet impingement on conductive panel cooling performance when subjected to uniform magnetic field effects. The cooling system has double rotating cylinders. Design/methodology/approach Cross-flow ratios (CFR) ranging from 0.1 to 1, magnetic field strength (Ha) ranging from 0 to 50 and cylinder rotation speed (Rew) ranging from −5,000 to 5,000 are the relevant parameters that are included in the numerical analysis. Finite element method is used as solution technique. Radial basis networks are used for the prediction of average Nusselt number (Nu), average surface temperature of the panel and temperature uniformity effects when varying the impacts of cross-flow, magnetic field and rotations of the double cylinder in the cooling channel. Findings The effect of CFR on cooling efficiency and temperature uniformity is favorable. By raising the CFR to the highest value under the magnetic field, the average Nu can rise by up to 18.6%, while the temperature drop and temperature difference are obtained as 1.87°C and 3.72°C. Without cylinders, magnetic field improves the cooling performance, while average Nu increases to 4.5% and 8.8% at CR = 0.1 and CR = 1, respectively. When the magnetic field is the strongest with cylinders in channel at CFR = 1, temperature difference (ΔT) is obtained as 2.5 °C. The rotational impacts on thermal performance are more significant when the cross-flow effects are weak (CFR = 0.1) compared to when they are substantial (CFR = 1). Cases without a cylinder have the worst performance for both weak and severe cross-flow effects, whereas using two rotating cylinders increases cooling performance and temperature uniformity for the conductive panel. The average surface temperature lowers by 1.2°C at CFR = 0.1 and 0.5°C at CFR = 1 when the worst and best situations are compared. Originality/value The outcomes are relevant in the design and optimization-based studies for electric cooling, photo-voltaic cooling and battery thermal management.

show abstract

Section: Introductionmentioning

confidence: 99%

Conductive panel cooling by using coupled effects of nano-jet impingement, double rotating cylinders and magnetic field under cross-flow

Selimefendigil,

Oztop

2024

HFF

View full text Add to dashboard Cite

show abstract

“…Using a developed numerical program, the authors have found that an introduction of copper nanoadditives intensify the energy transport and total entropy production. Jiang et al (2023) have described computationally mixed convection with entropy production of water combined with Fe 3 O 4 nanoparticles and multi-walled carbon nanotubes in a porous cube with inner rotating cylinders and an upper wavy wall. PDEs formulated using the Brinkman–Forchheimer extended Darcy approach for porous zone, Lorentz force for the magnetic field influence and Boussinesq approach for the buoyancy force have been worked out by the Galerkin weighted residual technique.…”

Section: Introductionmentioning

confidence: 99%

Natural convection and entropy generation in a trapezoidal region with hybrid nanoliquid under magnetic field

Roşca

Pop

et al. 2023

HFF

View full text Add to dashboard Cite

Purpose This paper aims to study numerically the steady natural convective heat transfer of a hybrid nanosuspension (Ag-MgO/H2O) within a partially heated/cooled trapezoidal region with linear temperature profiles at inclined walls under an effect of uniform Lorentz force. This investigation is useful for researchers studying in the area of cavity flows to know features of the flow structures and nature of hybrid nanofluid characteristics. In addition, a detailed entropy generation analysis has been performed to highlight possible regimes with minimal entropy generation rates. Design/methodology/approach The governing equations formulated using the Oberbeck–Boussinesq approach and single-phase nanoliquid model are transformed to a non-dimensional form by using non-dimensional variables. The obtained equations with appropriate boundary conditions are resolved by the finite difference technique. The developed code has been validated comprehensively. Analysis has been performed for a wide range of governing parameters, including Rayleigh number (Ra = 105), Prandtl number (Pr = 6.82), Hartmann number (Ha = 0–100), magnetic field inclination angle (φ = 0–?/2) and nanoparticles volume fraction (φhnf = 0 and 2%). Findings It has been shown that inclined magnetic field can be used to manage the energy transport performance. An inclusion of nanoparticles without Lorentz force influence allows forming more stable convective regime with descending heat plume in the central zone, while such a regime was performed for clear fluid only for moderate and high Hartmann numbers. Moreover, the average overall entropy generation can be decreased with a growth of the Hartmann number, while an addition of hybrid nanoparticles allows reducing this parameter for Ha = 30 and 50. The average Nusselt number can be increased with a growth of the nanoparticles concentration for low values of the magnetic field intensity. Originality/value Governing equations written using the conservation laws and dimensionless non-primitive variables have been resolved by the finite difference approach. The created numerical code has been verified by applying the grid independence test and computational outcomes of other researchers. The comprehensive analysis for various key parameters has been performed.

show abstract

“…It should be noted that there have been few attempts to study hybrid nanoliquid ow. [20][21][22][23][24][25][26][27][28][29][30] Entropy generation is the measurement of energy wastage during any thermal process. Entropy always increases in an irreversible process, and therefore, entropy generation is a positive quantity.…”

Section: Introductionmentioning

confidence: 99%

KHA model comprising MoS₄and CoFe₂O₃in engine oil invoking non-similar Darcy–Forchheimer flow with entropy and Cattaneo–Christov heat flux

Khan,

Hayat,

Alsaedi

2023

Nanoscale Adv.

View full text Add to dashboard Cite

show abstract

Mixed convection heat transfer and entropy generation of MHD hybrid nanofluid in a cubic porous cavity with wavy wall and rotating cylinders

Cited by 52 publications

References 32 publications

Conductive panel cooling by using coupled effects of nano-jet impingement, double rotating cylinders and magnetic field under cross-flow

Conductive panel cooling by using coupled effects of nano-jet impingement, double rotating cylinders and magnetic field under cross-flow

Natural convection and entropy generation in a trapezoidal region with hybrid nanoliquid under magnetic field

KHA model comprising MoS₄and CoFe₂O₃in engine oil invoking non-similar Darcy–Forchheimer flow with entropy and Cattaneo–Christov heat flux

Contact Info

Product

Resources

About

Mixed convection heat transfer and entropy generation of MHD hybrid nanofluid in a cubic porous cavity with wavy wall and rotating cylinders

Cited by 52 publications

References 32 publications

Conductive panel cooling by using coupled effects of nano-jet impingement, double rotating cylinders and magnetic field under cross-flow

Conductive panel cooling by using coupled effects of nano-jet impingement, double rotating cylinders and magnetic field under cross-flow

Natural convection and entropy generation in a trapezoidal region with hybrid nanoliquid under magnetic field

KHA model comprising MoS4and CoFe2O3in engine oil invoking non-similar Darcy–Forchheimer flow with entropy and Cattaneo–Christov heat flux

Contact Info

Product

Resources

About

KHA model comprising MoS₄and CoFe₂O₃in engine oil invoking non-similar Darcy–Forchheimer flow with entropy and Cattaneo–Christov heat flux